opportune 发表于 2025-3-28 17:32:43

http://reply.papertrans.cn/27/2635/263451/263451_41.png

Mechanics 发表于 2025-3-28 19:34:37

http://reply.papertrans.cn/27/2635/263451/263451_42.png

LAVE 发表于 2025-3-29 01:15:05

http://reply.papertrans.cn/27/2635/263451/263451_43.png

疲劳 发表于 2025-3-29 03:12:13

http://reply.papertrans.cn/27/2635/263451/263451_44.png

faucet 发表于 2025-3-29 08:58:21

http://reply.papertrans.cn/27/2635/263451/263451_45.png

开花期女 发表于 2025-3-29 14:31:39

https://doi.org/10.1057/9781403982858 determine which transformations preserve beads. We give conceptually easy first-order complete query languages and computationally complete query languages for trajectory databases, which allow to talk directly about speed and beads. The queries expressible in these languages are invariant under speed- and bead-preserving transformations.

Trigger-Point 发表于 2025-3-29 17:08:25

http://reply.papertrans.cn/27/2635/263451/263451_47.png

membrane 发表于 2025-3-29 23:18:14

http://reply.papertrans.cn/27/2635/263451/263451_48.png

晚来的提名 发表于 2025-3-30 00:41:01

http://reply.papertrans.cn/27/2635/263451/263451_49.png

ILEUM 发表于 2025-3-30 04:39:45

Contested Bodies of Childhood and Youtht conjunctive queries – in fact, no monotonic language is sufficiently powerful. We also exhibit several well-behaved classes of conjunctive views and queries for which conjunctive rewritings remain sufficient. This continues a previous investigation of rewriting and its connection to semantic determinacy, for various query and view languages.
页: 1 2 3 4 [5] 6 7
查看完整版本: Titlebook: Database Theory – ICDT 2007; 11th International C Thomas Schwentick,Dan Suciu Conference proceedings 2006 Springer-Verlag Berlin Heidelberg